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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Three Valleys Municipal Water District

1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND10ND
2016ND20ND
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2012-07-183761-002-1015ND
2012-07-183761-004-0752ND
2013-07-163761-002-1100ND
2013-07-163761-004-1005ND
2014-08-263761-002-1020ND
2014-08-263761-004-1000ND
2015-07-143761-002-0840ND
2016-03-153761-004-0915ND
2016-07-193761-002-0930ND
2017-03-213761-004-1100ND
2017-07-183761-002-0830ND